.ztree.chk{
    margin-left: 60px;
}
.ztree.chk li span{
    line-height: 22px;
}
.ztree.chk li span.button.bottom_close{
    background-position: -74px -33px !important;
}
.ztree.chk li span.button.bottom_open{
    background-position: -92px -33px !important;
}
.ztree.chk li span.button.center_close{
    background-position: -74px -15px;
}
.ztree.chk li span.button.center_open{
    background-position: -92px -15px;
}
.ztree.chk li span.button.root_close{
    background-position: -74px 3px;
}
.ztree.chk li span.button.root_open{
    background-position: -92px 3px
}